A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Qemu | Qemu | 6.0.0 (including) | 7.0.0 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | virt-devel:rhel-8060020220408104655.d63f516d | * |
| Red Hat Enterprise Linux 8 | RedHat | virt:rhel-8060020220408104655.d63f516d | * |
| Red Hat Enterprise Linux 9 | RedHat | qemu-kvm-17:7.0.0-13.el9 | * |
| Qemu | Ubuntu | devel | * |
| Qemu | Ubuntu | impish | * |
| Qemu | Ubuntu | jammy | * |
| Qemu | Ubuntu | trusty | * |
Potential Mitigations
References
- https://access.redhat.com/security/cve/CVE-2021-4158
- https://bugzilla.redhat.com/show_bug.cgi?id=2035002
- https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e
- https://gitlab.com/qemu-project/qemu/-/issues/770
- https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html
- https://access.redhat.com/security/cve/CVE-2021-4158
- https://bugzilla.redhat.com/show_bug.cgi?id=2035002
- https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e
- https://gitlab.com/qemu-project/qemu/-/issues/770
- https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html